High-voltage sealed direct-current contactor with reed type auxiliary contact

Abstract

The high-voltage sealed direct-current contactor comprises a contact point rod, a ceramic seat, a spring piece, a shielding cover and a pushing mechanism, the pushing mechanism comprises a contact bridge, an upper support and a first push rod, the upper support is fixed on the first push rod, an insulating material convex hull is fixed on the upper support, and the insulating material convex hull is fixed on the ceramic seat. Electromagnetic attraction generated in a power-on state enables the first push rod to move upwards, the contact bridge makes contact with the contact point rod, the coil is powered off, the first push rod moves downwards, the contact bridge is separated from the contact point rod, the main contact is disconnected, meanwhile, the insulating material convex hull is driven to move in the direction away from the spring piece, and the auxiliary contact is disconnected. The convex hulls control on-off of auxiliary contact signals by controlling contact and separation of the spring pieces, the auxiliary contact structure is arranged in the central area, the space of the arc extinguishing magnetic steel does not need to be sacrificed, the occupied space is small, the stroke of the auxiliary contact can be controlled by adjusting the height of the convex hulls, and therefore the auxiliary contact can effectively monitor the state of the main contact.

Description

technical field [0001] The invention relates to the technical field of DC contactors, in particular to a high-voltage sealed DC contactor with reed-type auxiliary contacts. Background technique [0002] When the main contact of the sealed DC contactor is turned on or off, the auxiliary contact needs to be turned on (or off) to determine the state of the main contact. The auxiliary contact is used to determine the state of the main contact. To improve the safety of the product in actual use, a micro switch is arranged on the side of the arc extinguishing chamber, and the push rod is connected to the plastic sheet. (or off) state to turn on the signal, but this structure is due to the small stroke of the micro switch, when the main contact is stuck, the auxiliary contact will show non-conduction, that is, the auxiliary contact cannot effectively monitor the state of the main contact. In addition, since the auxiliary contact is arranged on the side of the main contact and occu...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a high-voltage sealed DC contactor with a reed-type auxiliary contact, which solves the problem that the stroke of the micro switch in the device is small, and the auxiliary contact cannot effectively monitor the state of the main contact. This phenomenon affects the contactor. In addition, since the auxiliary contact is set on the side of the main contact and occupies a relatively large space, it is necessary to reduce the space of the arc extinguishing magnet, which is not conducive to the arc extinguishing of the main contact, and will cause unstable breaking performance of the product

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